How do i work out my ovolution period? my period started on the 9th dec and finishd 14th dec i usually start 25 days after finishing ?

14 days before: Ovulation occurs consistently about 14 days before your next cycle. If you know how many days there are from the first day of the bleeding during your normal cycle just subtract 14 days. This allows you to predict when you should be ovulating.

2weeks after 1st day: The first day of your period is considered day 1, you ovulate approximately on day 14, so the window is day 10-16 or 12-18, and varies from person to person.

Ovulation, fertility: You're likely to be most fertile from monday, 12/17/12 to saturday, 12/22/12. If you were to get pregnant during that time, your due date would be thursday, september 12, 2013. Of course, you may not conceive right away. But here's good news: 85 percent of couples who simply stop using birth control conceive within a year. You'll only increase your chances by knowing your fertile periods.